The Anglia region is included in a Met Office yellow weather warning for the risk heavy rain and localised downpours on Friday and Saturday.
The Met Office says 15-20 mm of rain could fall in an hour in some spots and there's the added risk of thunder, lightning and hail.
The warning is valid until 9pm on Saturday 28 June 2014.
- Send any pictures you have of the weather conditions in the Anglia region to email@example.com
The Met Office says: "Following a lull in activity overnight, further slow-moving thundery downpours will develop during Saturday. This is an update of the warning first issued on Thursday, separating Friday and Saturday, to more clearly differentiate the perceived risks and areas to be affected."